All LA Series amplifiers are built with tunnel-cooled heat sinks, variable-speed DC fans and extensive protection circuitry for superior efficiency into difficult loads and power conditions. In the Crest Audio tradition, these robust amps also boast more power devices (16 per channel) than any competitive amplifier, plus a switched-rail class H output stage and triple-compound design to provide low distortion and excellent thermal stability. Based on powerful Pro 200. Series technology and utilizing a linear power supply, our three versatile LA Series amps deliver stable high power output for running main systems, monitors and subwoofers.